Lawrence Livermore National Security, LLC

University of California

Fisk University

Alexander D Drobshoff

Stephen Anthony Payne

Nerine Jane Cherepy

Arnold Burger

Giulia E Hull

Jay Walter Dawson

Raymond John Beach

Deanna M Pennington

Wolfgang Hackenberg

Zhi Ming Liao

Domenico Bonaccini Calia

Luke Taylor

In one embodiment, a material comprises a crystal comprising strontium iodide providing at least 50,000 photons per MeV, where the strontium iodide material is characterized by a volume not less than 1 cm. In another embodiment, a scintillator optic includes europium-doped strontium iodide providing at least 50,000 photons per MeV, where the europium in the crystal is primarily Eu, and the europium is present in an amount greater than about 1.6%. A scintillator radiation detector in yet another embodiment includes a scintillator optic comprising SrIand BaI, where a ratio of SrIto BaIis in a range of between 0:1 and 1.0, the scintillator optic is a crystal that provides at least 50,000 scintillation photons per MeV and energy resolution of less than about 5% at 662 keV, and the crystal has a volume of 1 cmor more; the scintillator optic contains more than about 2% europium.

Barium iodide and strontium iodide crystals and scintillators implementing the same

In one embodiment, a material comprises a crystal comprising strontium iodide providing at least 50,000 photons per MeV. A scintillator radiation detector according to another embodiment includes a scintillator optic comprising europium-doped strontium iodide providing at least 50,000 photons per MeV. A scintillator radiation detector in yet another embodiment includes a scintillator optic comprising SrIand BaI, wherein a ratio of SrIto BaIis in a range of between 0:1 A method for manufacturing a crystal suitable for use in a scintillator includes mixing strontium iodide-containing crystals with a source of Eu, heating the mixture above a melting point of the strontium iodide-containing crystals, and cooling the heated mixture near the seed crystal for growing a crystal. Additional materials, systems, and methods are presented.

An optical fiber amplifier includes a length of silica optical fiber having a core doped with neodymium, a first cladding and a second cladding each with succeeding lower refractive indices, where the first cladding diameter is less than 10 times the diameter of the core. The doping concentration of the neodymium is chosen so that the small signal absorption for 816 nm light traveling within the core is less than 15 dB/m above the other fiber losses. The amplifier is optically pumped with one laser into the fiber core and with another laser into the first cladding.

High power 938 nanometer fiber laser and amplifier

Growing community of inventors

Livermore, CA, United States of America

Alexander D Drobshoff